Throttle-valve



(NoModL) Y y C. H. WO'RTHEN..

y THROTTLE VALVE. No. 332,855. y Patented Dea-22, 1885.

UNITED STATES PATENT OFFICE.

CHARLES H. WORTHEN, OF LAWRENCE, MASSACHUSETTS.

TH ROTTLE-VALVE.

SPECIFICATION forming part of Letters Patent No. 332,855, dated December 22,1885.

Application filed December 22, 1884. Serial No. 150,903.

To all whom, it may concern.:

Be it known that I, CHAELEs H. WOETHEN, of Lawrence, in the county of Essex and State of Massachusetts, a citizen of the United States, have invented a new and useful Improvement in Throttle-Valves, of which the following is a full, clear, and exact description, reference being had to the accompanying drawing, forming a part of this specification in explaining its nature, in which the figure represents in vertical section the steam-dome of a locomotive and a portion of the dry-pipe and boilersheet.

Referring to the drawing, A is the steamdome; B, the dry-pipe; C, the throttle-valve. It consists, essentially, of the cylindrical casing'c, which, preferably, is formed by casting. It has the openings or passages c, and it is attached to or formed upon the upper section, c,- of the dry-pipe. Arranged to slide in the cylindrical casing is the valve D, which is made in the form of a cylindrical shell having the openings or ports d, which upon the movement of the shell are brought into line with the passages c in the casing. The valve is moved by means of the rod d', pivotcd to the bent lever d2 at d3. The bent lever is pivoted at d* to the dry-pipe or any other suitable support, and its downwardly-extending arm is pivoted at d5 to the rod d, which extends to the cab of the locomotive. The casing cis properly finished to receive the cylindrical valve-shell, and there may loe arranged suitable packings about the vedges of the passages c', surrounding the valve, if desired. Upon the movement of the shell in one direction the passages c are closed by the solid portions of the shell, and upon the reverse movement the ports d are brought in line with the passages, so that the steam escapes from the dome to the dry-pipe. I prefer to arrange across the lower opening of the casing the netting or Wire-gauze E, which prevents the priming of the boiler from entering the valve or dry-pipe.

It will be observed that this valve is very simple in construction, and is very efficient in operation; that it is balanced by steampressure, so that it can be easily operated and with very little wear upon the bearings, and that it cannot easily get out of order; that it does not readily leak on .account of the extended seats, and if the rod d6 is free to move (No model.)

it will, when vertically arranged as represented in the figure, automatically shut the passages by its own gravity.

I do not confine myself to the number. of passages and openings in the casing and valve herein described, nor to the speciiie means for operating the valve herein indicated, but I may vary the number of passages and openings to any extent, 'and may use any other suitable means for moving the valve.

It will be observed that the valve-casing 0 is open at both ends, so that it receives steam from the chamber of the steam-dome at both ends; also, .that the cylindrical valve D is also open at both ends, so that it receives steam from both ends, and that by this construction a smaller valve for delivering a given quantity of steam can be used than if the opening were at one end of the casing of the valve only.

Having thus fully described my invention, I claim and desire to secure by Letters Patent' of the United Statesl. In a throttle-valve, the combination of the steam-dome A of a steam-boiler, the drypipe B, the cylindrical casing c within the the dome A and having an opening at both ends, and the ports or passages c', connecting its opening with the dry-pipe, with the cylindrical valve D, also open at both ends and having the ports or passages d, and movable in said casing c in relation to the ports or passages c', all substantially as described.

2. The combination, in a throttle-valve, of the cylindrical casing c, having an opening at each end, and one or more ports or passages, c', connecting with the dry-pipe c2, with the cylindrical valve D, having openings at both ends, and one or more ports, d, adapted to be brought in register with the ports c by the movement of the valve in the casing, the spindle d', lever d2, and rod d6 for moving the valve-cylinder, all substantially as described.

3. rIhe combination of the cylindrical tubular valve-casing c with the wire gauze or netting E extended across the opening c of said casing, all substantially as and for the purposes described.

CHARLESA H. WORTHEN. In presence off- GHARLEs U. BELL, WM. O. WABBAN. 

